Effect of sowing date and plant density on the cell morphology of hemp (Cannabis sativa L.) |
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| Institution: | 1. College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming, 650201, Yunnan, China;2. Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, Yunnan, China;3. School of Agriculture, Yunnan University, Kunming, 650500, China;1. Department of Pharmacy, University of Pisa, Via Bonanno 6, Pisa, Italy;2. Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, Pisa, Italy;1. Centre des Matériaux des Mines d’Alès, IMT Mines Alès, Université de Montpellier, 6 avenue de Clavières, 30319 Alès Cedex, France;2. Laboratoire du Génie de l’Environnement Industriel, IMT Mines Alès, Université de Montpellier, 6 avenue de Clavières, 30319 Alès Cedex, France;1. Center for Bioprocess Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark;2. Department of Forest Products/Wood Science, Swedish University of Agricultural Sciences, Vallvägen 9D, 750-07 Uppsala, Sweden;3. Section of Composites and Materials Mechanics, Department of Wind Energy, Technical University of Denmark, 4000 Roskilde, Denmark;1. Instituto Andaluz de Investigación y Formación Agraria y Pesquera (IFAPA), Centro “las Torres-Tomejil”, Ctra, Sevilla-Cazalla km, 12’2, 41200, Alcalá del Río, Seville, Spain;2. Instituto Andaluz de Investigación y Formación Agraria y Pesquera (IFAPA), Centro “Camino de Purchil”. Apdo. 2027, 18080 Granada, Spain;3. Phytoplant Research SL, Rabanales 21 - Parque Científico Tecnológico de Córdoba, Calle Astrónoma Cecilia Payne, Edificio Centauro módulo B-1, 14014, Córdoba, Spain |
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| Abstract: | A range of papers report a major effect of agronomic procedures on the growth, biomass, fibre yield and fibre quality of hemp. The aim of this paper is to examine the influence of sowing date, seed density and year on histological characteristics of hemp (size of the different layers in the cross section of the stem, area of primary fibre cells and their cell lumen, size of fibre cell wall). It was realised that a higher seed density resulted in a reduction of almost all layers in the cross section of the stem. A similar effect was caused by the drought 1998, whereas the sowing date had almost no influence on the size of the various layers. The area of primary fibre cells was smaller in 1998. Sowing date and seed density did not affect the fibre cell area and area of cell lumen in the way mentioned above during the 2 years of the trial. During this period the size of cell wall was mainly determined by climatic conditions. Higher elongation and higher tensile strength of hemp planted at higher seed density is probably caused by differences in primary cell morphology. |
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